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CLOG(3) Library Functions Manual CLOG(3)NAMEclog,clogf,clogl-- complex natural logarithm functionsSYNOPSIS#include<complex.h>double complexclog(double complex z); float complexclogf(float complex z); long double complexclogl(long double complex z);DESCRIPTIONThese functions compute the complex natural (base e) logarithm of z, with a branch cut along the negative real axis.RETURNVALUESThese functions return the complex natural logarithm value, in the range of a strip mathematically unbounded along the real axis and in the interval [-i pi, +i pi] along the imaginary axis.ERRORSNo errors are defined.SEEALSOcexp(3), IEEE Std 1003.1-2001 (``POSIX.1'') <complex.h>COPYRIGHTPortions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html . NetBSD 7.1.2 January 29, 2013 NetBSD 7.1.2